Java Utililty Methods List Copy

List of utility methods to do List Copy

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Description

The list of methods to do List Copy are organized into topic(s).

Method

ArrayListcopyNullSafeMutableList(Collection list)
copy Null Safe Mutable List 
if (list == null)
    throw new NullPointerException("list");
ArrayList<E> result = new ArrayList<E>(list);
for (E element : result) {
    if (element == null)
        throw new NullPointerException("element");
return result;
...
ListcopyObjectList(List objects)
Get a copy of a list of objects 
List<Object> answer = new ArrayList<Object>();
if (objects == null)
    return null;
for (Object o : objects) {
    answer.add(o);
return answer;
ListcopyOf(List list)
Returns a copy of the given list. 
List<T> result = new ArrayList<>(list.size());
result.addAll(list);
return result;
ListcopyOf(List values)
copy Of 
return new ArrayList<T>(values);
ListcopyOfRange(List list, int from, int to)
Returns a new list containing all elements of the original list with an index in [from;to] 
if (from < 0 || from >= list.size() || to < 0 || to >= list.size() || from > to)
    throw new IllegalArgumentException("Illegal extraction bounds");
List<T> result = new ArrayList<>(to - from + 1);
for (int i = from; i <= to; i++)
    result.add(list.get(i));
return result;
voidcopyProbabilities(List targetProbs, List destinationProbs)
Copy the values of target probs into destination probs 
for (int index = 0; index < targetProbs.size(); index++) {
    destinationProbs.set(index, targetProbs.get(index));
ListcopyQueryFilters(List queryFilters)
copy Query Filters 
return queryFilters != null ? new ArrayList<String>(queryFilters) : new ArrayList<String>();
java.util.ListcopySafelyToObjectList(java.util.List list)
copy Safely To Object List 
java.util.Iterator<?> it = list.iterator();
java.util.List<Object> castedCopy = new java.util.ArrayList<Object>();
while (it.hasNext()) {
    castedCopy.add(it.next());
return castedCopy;
ArrayListcopyStringList(List l1)
copy String List 
if (l1 == null) {
    return null;
ArrayList<String> l2 = new ArrayList<String>(l1.size());
for (String str : l1) {
    l2.add(str);
return l2;
...
ListcopyStringList(List list)
copy String List 
List<String> result = new ArrayList<String>(list.size());
result.addAll(list);
return result;